Chapter 22, Problem 22.47P

Interpretation Introduction

Interpretation:

A thermodynamic analysis of roasting of metal sulphides in air and then reduction with carbon has to be given.  Also, reason for the metal sulfides cannot be reduced with carbon to produce metal.

Concept Introduction:

Free energy, ${\text{ΔG}}^{\text{ο}}$, is the measure of the ability of a reaction to proceed spontaneously. ${\text{ΔG}}^{\text{ο}}$ can be calculated with the relationship.

    ${\displaystyle \sum _{}^{}{\text{mΔG}}_{{}^{\text{f}}\text{(products)}}^{\text{o}}\text{-}}{\displaystyle \sum _{}^{}{\text{mΔG}}_{{}^{\text{f}}\text{(reactants)}}^{\text{o}}}$